Improved apparatus for tempering saw-plates and similar articles of steel



G. MERGER 8v J. HINTON. APPARATUS FOR TEMPBBING SAW PLATES AND SIMILAR ARTICLES 0F STEEL, 1

No. 77,396. Patented Apr. 228, 1868.

lllllll g ins gist 2's gaunt ffirel GEORGE MERCER AND JOHN HINTON; OF S'IULOUI S, MISSOURI;

Letters Patent No. 77,396, dated April 28, 1868;

IMPROVED APPARATUS FOR TEMPERING SAW-PLATES 'ANUSIMIL'AR ARTIQLES OF STEEL.

I "dig: Stimuli referral it in than Esters gaunt-ant tubing part at It: same.

TO ALL WHOM IT MAY CONCERN: i

Be it known that we, GEORGE MERQER and JOHN HINTON, of St. Louis, in the county of St. Louis, and State of Missouri, have made certain new and useful, Improvements in Apparatus for Tempering Saws and 'other Thin Plates of Steel; and we do hereby declare that the following is a full and clear description'thereof,

reference being had to the accompanying drawings, and to the letters ofreference. marked thereon.

This apparatus consists of a device for clamping the plates before and during the tempering operation, and

also certain devices for submer'ging the carriage and the clamped plates into the bath, and also certain other I devices for straightening and securing the plates, which will be hereinafter more fully explained.

To enable those skilled in the art to makeand use our improved apparatus, we will proceed to describe its construction and operation.

Figure 1, of the drawings, is a longitudinal sectional elevation of the improved apparatus.

Figure 2 is a plan of the same.

Figure-3 is a. sectional plan of the apparatus, showing the ways on which the c descends into the bath.

Figure 4 is a plan of the carriage, which secures and clamps the plates.

Thebath-tub A is a shallow vessel, usually of wrought iron, whollyienclosed, with the exception ofone end, and set on a frame at an an le of inclination of about thirty degrees (more or less) with a horizontal plane, the open end being the elevdted one.' A horizontal platforin, A, is placed at the. upper end of the box or bath arriage sustaining the plates tub, and in contact with the floor thereof, so that the ways or tracks a, on which the carriage B runs, are easily curved over from the floor of the bathtub to the said platform. The carriage B rests ousmall wheels or sheaves,

6, which run on the tracks a. The said carriage B consists of a horizontal, or, rather, fiat perforated plate, b,v strengthened by means of the external ribs 6, which cross th'esaid plate diagonally, andv thereby secure the centre of it from springing or bulging out of a true line. The. cap B is similar in construction to tho bed-plate or carriage B, having similar stifl'ening-ribs, 6 The cap 13 is hinged to the plate B by means of the eccentric shaft B. When a. saw or plate is to be tempered in this apparatus, the carriage B B is to be drawn up on the platform A by means of the endless rope or chain 0, which is operated by the roller 0' and crank c. This same -rope or chain passes over 9. sheave, c", at the bottom of the bath-tub, and also serves as a. means to run the carriage down into the bath. When the carriage is up on the said platform A, the rope or chain D is to be attached to the clevis d by means-of the pin d, the said clevisdbeing'attached to the cap-plate B, which is then raised up like an open door, as is indicated by the red lines in fig. by simply winding the rope D. up

around the crab d by turning the crank The plate E, which is to be tempered, is then to be placed, red

hot, on the flat surface of the carriage or plate B, and the cap :13 is to be let fall suddenly onthe plate thus placed, by withdrawing the pin d, which is accomplished by jerking the cord, d, attached to the said pin.

The cap 13, being of considerable weight, will, when released in this manuer, fall with such' force on the plate E as to straighten it of all kinks on bends. Of course, the two adjacent surfaces of the plates B, B, should be made perfectly true for this purpose. When the plate Ehas' becn thus confined on itscarriage, the whole apparatus will be submerged in the bath by drawing it down by means of the cord or chain JG, roller 0, and crank c. While submerged in the bath, the tempering or hardening-fluid will find access to everypsrt of the plate,through the perforations of B and B. Lest theplate E should be too closely confined between its el mping plstes B and B, the cap-piece B is given a. reciprocating sliding motion, by means of its eccentric I coupling-shaft, B, as is shown by the dotted lines in fig. 4.

A The shaft B isrevolvedebout its axis by means of the endless chain or rope F, which is actuated by the roller F and crank f. The said chain or rope F passes o'ver'a grooved'wheehf, ulfixegl'to the end of the shaft B, and also around a similsrwheel, f, p1aced atithe bottom of the bath-tub, and thus the required motion of the cap B maybe produced at any position of the-said carriage. If the weight of the cap B should not prove suflicicnt to straighten the plate E by letting it fall thereon, as has already been described, a. set-sciew, G, is

provided in the top of the bathtub, which may be screwed down on top of the cap B, so as to press the plate and set forth.

into the required form while it is submerged. Springs H arepluced at the bottom end of the bath-tub. in such positions as to receive the shock of the carriage when descending thereinto.

Having, described our invention, What we claim is I 1. The carriage B B, when constructed of perforated plates, and-the trussing-ribs b, bfl-substnntialfl as shown and described.

2. We claim the combination and srr'nngement of the cap B, rope or chain D, clevis d, and pin d, and crab d, all'arranged and operated as described and set forth,for the purpose of clrm iping and straightening the plates E.

3 We claimtho cup B, when combined ecoentriqally with the carriage B, by income of the eccentric-shaft B, and operated by the c liein or rope F, pollen F, end crank f, for the purpose of exposing the whole surface of the plate to the action of the tempering-fluid.

4. We claim the springs H, ivhen arranged in combination with the bath-tub A, as herein-described and set forth.

5. We claim the set-screw G when employed in connection with the tub A and carriage B B, as described GEORGE MERCER, JOHN HINTON.

Witnesses:

M. RANDOLPH, H. PAULI. 

